I need some advice. I own and operate a marketing firm and spend long days at the office. Currently I ditched my Windows laptop since I converted the whole firm to Mac. I have 4 Mac Pros, 27 iMacs. All bought by me but not 'mine' to use. They are for employees. I need another iMac for a new employee so I gave her mine from my office not wanting to spend for another one. I thought I can use my iPad 2 just sit at the conference table and do my work in my office. But the iPad 2 and keyboard combo is not getting it done. Not good enough. I have a imac 27 2.93 2010 with SSD and 12GB ram at home right now. I need something that is mobile, and can do most of the work my iMac can do right now. I mostly do presentations, writing, etc. Some light Auto Cad stuff, nothing major. Would a Mac BookAir 13.3 with the Core i7 and Thunderbolt display take care of most of my needs? Is the 4gb ram limiting? I will be getting a Thunderbolt display for the office too. I think i will just need some input from some Air users out there. The Air would let me continue my work at home on the bigger display form the office instead of transferring the work from my iPad 2 or borrowed iMac at work to home. My brother in law offered me $2,300 for the iMac. I complained that I should get a laptop for work and then he offered to buy it from me. The iMac is flawless. No stuck pixels, yellowing of any kind. Perfect. Only four months old. Any ideas?